What provides the main source of air to the furnace?
A) Damper
B) Air register
C) Furnace purge
D) Stack
Answer: B
Explanation: A) Incorrect. The purpose of the damper is to regulate the flow of air or draft in the furnace.
B) Correct. An air register, also called the burner damper, provides the main source of air to the furnace.
C) Incorrect. A furnace purge is the process of adding steam or air flow to the firebox in order to remove, or sweep, combustibles from the furnace prior to lighting the burner and startup.
D) Incorrect. The stack is a cylindrical outlet, located at the top of a furnace through which flue (combustion) gas is removed from the furnace.
You might also like to view...
A heat pump uses a 6 hp motor to deliver 58,500 Btu/hr of heat to a building. Determine the coefficient of performance of the heat pump.
Given: Q?H=?58,500Btuhr; W?=?6 hp= ?15,270 Btu/hr What will be an ideal response?
A headlight bulb does not light up when turned on. Back probing the connector shows voltage on both wires of the bulb. This indicates _________
A) A bad bulb B) A blown fuse C) A dead battery D) A bad ground
If you see an amplifier with a tank circuit in the collector, chances are it is a
A) transformer-coupled amplifier B) low-frequency power amplfier C) class C amplfier D) complimentary symmetry amplfier
An autotransformer differs from most transformers in that:
A) it does not isolate the primary voltage from the secondary voltage. B) primary and secondary windings are the same. C) source current flows through both the windings. D) all of these.